Expansion Chamber - Honda CR250R Owner's Manual & Competition Handbook

Refer to Safety Precautions on page 19.
Expansion Chamber Inspection
1. Check the expansion chamber springs, and
replace them if they are damaged or stretched.
2. Check the mounting bolts for tightness.
3. Check the expansion chamber for cracks or
deformation.
A damaged chamber may decrease engine
performance.
Expansion Chamber Removal
1. Remove the expansion chamber by removing
the expansion chamber springs (1) and
mounting bolts (2).
2. Remove the exhaust gasket.
(2)
(1) springs (2) bolts
3. Remove carbon deposits from the head pipe
of the expansion chamber.
Check the O-rings (3) on the head pipe for
wear.
(3) O-rings

Expansion Chamber

Expansion Chamber Installation
Install the expansion chamber in the reverse order
of removal.
(1)
(3)
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Servicing Your Honda